1 /* $OpenBSD: sftp-client.c,v 1.135 2019/10/04 04:31:59 djm Exp $ */
2 /*
3 * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 /* XXX: memleaks */
19 /* XXX: signed vs unsigned */
20 /* XXX: remove all logging, only return status codes */
21 /* XXX: copy between two remote sites */
22
23 #include "includes.h"
24
25 #include <sys/types.h>
26 #ifdef HAVE_SYS_STATVFS_H
27 #include <sys/statvfs.h>
28 #endif
29 #include "openbsd-compat/sys-queue.h"
30 #ifdef HAVE_SYS_STAT_H
31 # include <sys/stat.h>
32 #endif
33 #ifdef HAVE_SYS_TIME_H
34 # include <sys/time.h>
35 #endif
36 #include <sys/uio.h>
37
38 #include <dirent.h>
39 #include <errno.h>
40 #include <fcntl.h>
41 #include <signal.h>
42 #include <stdarg.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <unistd.h>
47
48 #include "xmalloc.h"
49 #include "ssherr.h"
50 #include "sshbuf.h"
51 #include "log.h"
52 #include "atomicio.h"
53 #include "progressmeter.h"
54 #include "misc.h"
55 #include "utf8.h"
56
57 #include "sftp.h"
58 #include "sftp-common.h"
59 #include "sftp-client.h"
60
61 extern volatile sig_atomic_t interrupted;
62 extern int showprogress;
63
64 /* Minimum amount of data to read at a time */
65 #define MIN_READ_SIZE 512
66
67 /* Maximum depth to descend in directory trees */
68 #define MAX_DIR_DEPTH 64
69
70 /* Directory separator characters */
71 #ifdef HAVE_CYGWIN
72 # define SFTP_DIRECTORY_CHARS "/\\"
73 #else /* HAVE_CYGWIN */
74 # define SFTP_DIRECTORY_CHARS "/"
75 #endif /* HAVE_CYGWIN */
76
77 struct sftp_conn {
78 int fd_in;
79 int fd_out;
80 u_int transfer_buflen;
81 u_int num_requests;
82 u_int version;
83 u_int msg_id;
84 #define SFTP_EXT_POSIX_RENAME 0x00000001
85 #define SFTP_EXT_STATVFS 0x00000002
86 #define SFTP_EXT_FSTATVFS 0x00000004
87 #define SFTP_EXT_HARDLINK 0x00000008
88 #define SFTP_EXT_FSYNC 0x00000010
89 #define SFTP_EXT_LSETSTAT 0x00000020
90 u_int exts;
91 u_int64_t limit_kbps;
92 struct bwlimit bwlimit_in, bwlimit_out;
93 };
94
95 static u_char *
96 get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len,
97 const char *errfmt, ...) __attribute__((format(printf, 4, 5)));
98
99 /* ARGSUSED */
100 static int
sftpio(void * _bwlimit,size_t amount)101 sftpio(void *_bwlimit, size_t amount)
102 {
103 struct bwlimit *bwlimit = (struct bwlimit *)_bwlimit;
104
105 refresh_progress_meter(0);
106 if (bwlimit != NULL)
107 bandwidth_limit(bwlimit, amount);
108 return 0;
109 }
110
111 static void
send_msg(struct sftp_conn * conn,struct sshbuf * m)112 send_msg(struct sftp_conn *conn, struct sshbuf *m)
113 {
114 u_char mlen[4];
115 struct iovec iov[2];
116
117 if (sshbuf_len(m) > SFTP_MAX_MSG_LENGTH)
118 fatal("Outbound message too long %zu", sshbuf_len(m));
119
120 /* Send length first */
121 put_u32(mlen, sshbuf_len(m));
122 iov[0].iov_base = mlen;
123 iov[0].iov_len = sizeof(mlen);
124 iov[1].iov_base = (u_char *)sshbuf_ptr(m);
125 iov[1].iov_len = sshbuf_len(m);
126
127 if (atomiciov6(writev, conn->fd_out, iov, 2, sftpio,
128 conn->limit_kbps > 0 ? &conn->bwlimit_out : NULL) !=
129 sshbuf_len(m) + sizeof(mlen))
130 fatal("Couldn't send packet: %s", strerror(errno));
131
132 sshbuf_reset(m);
133 }
134
135 static void
get_msg_extended(struct sftp_conn * conn,struct sshbuf * m,int initial)136 get_msg_extended(struct sftp_conn *conn, struct sshbuf *m, int initial)
137 {
138 u_int msg_len;
139 u_char *p;
140 int r;
141
142 if ((r = sshbuf_reserve(m, 4, &p)) != 0)
143 fatal("%s: buffer error: %s", __func__, ssh_err(r));
144 if (atomicio6(read, conn->fd_in, p, 4, sftpio,
145 conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL) != 4) {
146 if (errno == EPIPE || errno == ECONNRESET)
147 fatal("Connection closed");
148 else
149 fatal("Couldn't read packet: %s", strerror(errno));
150 }
151
152 if ((r = sshbuf_get_u32(m, &msg_len)) != 0)
153 fatal("%s: buffer error: %s", __func__, ssh_err(r));
154 if (msg_len > SFTP_MAX_MSG_LENGTH) {
155 do_log2(initial ? SYSLOG_LEVEL_ERROR : SYSLOG_LEVEL_FATAL,
156 "Received message too long %u", msg_len);
157 fatal("Ensure the remote shell produces no output "
158 "for non-interactive sessions.");
159 }
160
161 if ((r = sshbuf_reserve(m, msg_len, &p)) != 0)
162 fatal("%s: buffer error: %s", __func__, ssh_err(r));
163 if (atomicio6(read, conn->fd_in, p, msg_len, sftpio,
164 conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL)
165 != msg_len) {
166 if (errno == EPIPE)
167 fatal("Connection closed");
168 else
169 fatal("Read packet: %s", strerror(errno));
170 }
171 }
172
173 static void
get_msg(struct sftp_conn * conn,struct sshbuf * m)174 get_msg(struct sftp_conn *conn, struct sshbuf *m)
175 {
176 get_msg_extended(conn, m, 0);
177 }
178
179 static void
send_string_request(struct sftp_conn * conn,u_int id,u_int code,const char * s,u_int len)180 send_string_request(struct sftp_conn *conn, u_int id, u_int code, const char *s,
181 u_int len)
182 {
183 struct sshbuf *msg;
184 int r;
185
186 if ((msg = sshbuf_new()) == NULL)
187 fatal("%s: sshbuf_new failed", __func__);
188 if ((r = sshbuf_put_u8(msg, code)) != 0 ||
189 (r = sshbuf_put_u32(msg, id)) != 0 ||
190 (r = sshbuf_put_string(msg, s, len)) != 0)
191 fatal("%s: buffer error: %s", __func__, ssh_err(r));
192 send_msg(conn, msg);
193 debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id);
194 sshbuf_free(msg);
195 }
196
197 static void
send_string_attrs_request(struct sftp_conn * conn,u_int id,u_int code,const void * s,u_int len,Attrib * a)198 send_string_attrs_request(struct sftp_conn *conn, u_int id, u_int code,
199 const void *s, u_int len, Attrib *a)
200 {
201 struct sshbuf *msg;
202 int r;
203
204 if ((msg = sshbuf_new()) == NULL)
205 fatal("%s: sshbuf_new failed", __func__);
206 if ((r = sshbuf_put_u8(msg, code)) != 0 ||
207 (r = sshbuf_put_u32(msg, id)) != 0 ||
208 (r = sshbuf_put_string(msg, s, len)) != 0 ||
209 (r = encode_attrib(msg, a)) != 0)
210 fatal("%s: buffer error: %s", __func__, ssh_err(r));
211 send_msg(conn, msg);
212 debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id);
213 sshbuf_free(msg);
214 }
215
216 static u_int
get_status(struct sftp_conn * conn,u_int expected_id)217 get_status(struct sftp_conn *conn, u_int expected_id)
218 {
219 struct sshbuf *msg;
220 u_char type;
221 u_int id, status;
222 int r;
223
224 if ((msg = sshbuf_new()) == NULL)
225 fatal("%s: sshbuf_new failed", __func__);
226 get_msg(conn, msg);
227 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
228 (r = sshbuf_get_u32(msg, &id)) != 0)
229 fatal("%s: buffer error: %s", __func__, ssh_err(r));
230
231 if (id != expected_id)
232 fatal("ID mismatch (%u != %u)", id, expected_id);
233 if (type != SSH2_FXP_STATUS)
234 fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
235 SSH2_FXP_STATUS, type);
236
237 if ((r = sshbuf_get_u32(msg, &status)) != 0)
238 fatal("%s: buffer error: %s", __func__, ssh_err(r));
239 sshbuf_free(msg);
240
241 debug3("SSH2_FXP_STATUS %u", status);
242
243 return status;
244 }
245
246 static u_char *
get_handle(struct sftp_conn * conn,u_int expected_id,size_t * len,const char * errfmt,...)247 get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len,
248 const char *errfmt, ...)
249 {
250 struct sshbuf *msg;
251 u_int id, status;
252 u_char type;
253 u_char *handle;
254 char errmsg[256];
255 va_list args;
256 int r;
257
258 va_start(args, errfmt);
259 if (errfmt != NULL)
260 vsnprintf(errmsg, sizeof(errmsg), errfmt, args);
261 va_end(args);
262
263 if ((msg = sshbuf_new()) == NULL)
264 fatal("%s: sshbuf_new failed", __func__);
265 get_msg(conn, msg);
266 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
267 (r = sshbuf_get_u32(msg, &id)) != 0)
268 fatal("%s: buffer error: %s", __func__, ssh_err(r));
269
270 if (id != expected_id)
271 fatal("%s: ID mismatch (%u != %u)",
272 errfmt == NULL ? __func__ : errmsg, id, expected_id);
273 if (type == SSH2_FXP_STATUS) {
274 if ((r = sshbuf_get_u32(msg, &status)) != 0)
275 fatal("%s: buffer error: %s", __func__, ssh_err(r));
276 if (errfmt != NULL)
277 error("%s: %s", errmsg, fx2txt(status));
278 sshbuf_free(msg);
279 return(NULL);
280 } else if (type != SSH2_FXP_HANDLE)
281 fatal("%s: Expected SSH2_FXP_HANDLE(%u) packet, got %u",
282 errfmt == NULL ? __func__ : errmsg, SSH2_FXP_HANDLE, type);
283
284 if ((r = sshbuf_get_string(msg, &handle, len)) != 0)
285 fatal("%s: buffer error: %s", __func__, ssh_err(r));
286 sshbuf_free(msg);
287
288 return handle;
289 }
290
291 static Attrib *
get_decode_stat(struct sftp_conn * conn,u_int expected_id,int quiet)292 get_decode_stat(struct sftp_conn *conn, u_int expected_id, int quiet)
293 {
294 struct sshbuf *msg;
295 u_int id;
296 u_char type;
297 int r;
298 static Attrib a;
299
300 if ((msg = sshbuf_new()) == NULL)
301 fatal("%s: sshbuf_new failed", __func__);
302 get_msg(conn, msg);
303
304 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
305 (r = sshbuf_get_u32(msg, &id)) != 0)
306 fatal("%s: buffer error: %s", __func__, ssh_err(r));
307
308 debug3("Received stat reply T:%u I:%u", type, id);
309 if (id != expected_id)
310 fatal("ID mismatch (%u != %u)", id, expected_id);
311 if (type == SSH2_FXP_STATUS) {
312 u_int status;
313
314 if ((r = sshbuf_get_u32(msg, &status)) != 0)
315 fatal("%s: buffer error: %s", __func__, ssh_err(r));
316 if (quiet)
317 debug("Couldn't stat remote file: %s", fx2txt(status));
318 else
319 error("Couldn't stat remote file: %s", fx2txt(status));
320 sshbuf_free(msg);
321 return(NULL);
322 } else if (type != SSH2_FXP_ATTRS) {
323 fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
324 SSH2_FXP_ATTRS, type);
325 }
326 if ((r = decode_attrib(msg, &a)) != 0) {
327 error("%s: couldn't decode attrib: %s", __func__, ssh_err(r));
328 sshbuf_free(msg);
329 return NULL;
330 }
331 sshbuf_free(msg);
332
333 return &a;
334 }
335
336 static int
get_decode_statvfs(struct sftp_conn * conn,struct sftp_statvfs * st,u_int expected_id,int quiet)337 get_decode_statvfs(struct sftp_conn *conn, struct sftp_statvfs *st,
338 u_int expected_id, int quiet)
339 {
340 struct sshbuf *msg;
341 u_char type;
342 u_int id;
343 u_int64_t flag;
344 int r;
345
346 if ((msg = sshbuf_new()) == NULL)
347 fatal("%s: sshbuf_new failed", __func__);
348 get_msg(conn, msg);
349
350 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
351 (r = sshbuf_get_u32(msg, &id)) != 0)
352 fatal("%s: buffer error: %s", __func__, ssh_err(r));
353
354 debug3("Received statvfs reply T:%u I:%u", type, id);
355 if (id != expected_id)
356 fatal("ID mismatch (%u != %u)", id, expected_id);
357 if (type == SSH2_FXP_STATUS) {
358 u_int status;
359
360 if ((r = sshbuf_get_u32(msg, &status)) != 0)
361 fatal("%s: buffer error: %s", __func__, ssh_err(r));
362 if (quiet)
363 debug("Couldn't statvfs: %s", fx2txt(status));
364 else
365 error("Couldn't statvfs: %s", fx2txt(status));
366 sshbuf_free(msg);
367 return -1;
368 } else if (type != SSH2_FXP_EXTENDED_REPLY) {
369 fatal("Expected SSH2_FXP_EXTENDED_REPLY(%u) packet, got %u",
370 SSH2_FXP_EXTENDED_REPLY, type);
371 }
372
373 memset(st, 0, sizeof(*st));
374 if ((r = sshbuf_get_u64(msg, &st->f_bsize)) != 0 ||
375 (r = sshbuf_get_u64(msg, &st->f_frsize)) != 0 ||
376 (r = sshbuf_get_u64(msg, &st->f_blocks)) != 0 ||
377 (r = sshbuf_get_u64(msg, &st->f_bfree)) != 0 ||
378 (r = sshbuf_get_u64(msg, &st->f_bavail)) != 0 ||
379 (r = sshbuf_get_u64(msg, &st->f_files)) != 0 ||
380 (r = sshbuf_get_u64(msg, &st->f_ffree)) != 0 ||
381 (r = sshbuf_get_u64(msg, &st->f_favail)) != 0 ||
382 (r = sshbuf_get_u64(msg, &st->f_fsid)) != 0 ||
383 (r = sshbuf_get_u64(msg, &flag)) != 0 ||
384 (r = sshbuf_get_u64(msg, &st->f_namemax)) != 0)
385 fatal("%s: buffer error: %s", __func__, ssh_err(r));
386
387 st->f_flag = (flag & SSH2_FXE_STATVFS_ST_RDONLY) ? ST_RDONLY : 0;
388 st->f_flag |= (flag & SSH2_FXE_STATVFS_ST_NOSUID) ? ST_NOSUID : 0;
389
390 sshbuf_free(msg);
391
392 return 0;
393 }
394
395 struct sftp_conn *
do_init(int fd_in,int fd_out,u_int transfer_buflen,u_int num_requests,u_int64_t limit_kbps)396 do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests,
397 u_int64_t limit_kbps)
398 {
399 u_char type;
400 struct sshbuf *msg;
401 struct sftp_conn *ret;
402 int r;
403
404 ret = xcalloc(1, sizeof(*ret));
405 ret->msg_id = 1;
406 ret->fd_in = fd_in;
407 ret->fd_out = fd_out;
408 ret->transfer_buflen = transfer_buflen;
409 ret->num_requests = num_requests;
410 ret->exts = 0;
411 ret->limit_kbps = 0;
412
413 if ((msg = sshbuf_new()) == NULL)
414 fatal("%s: sshbuf_new failed", __func__);
415 if ((r = sshbuf_put_u8(msg, SSH2_FXP_INIT)) != 0 ||
416 (r = sshbuf_put_u32(msg, SSH2_FILEXFER_VERSION)) != 0)
417 fatal("%s: buffer error: %s", __func__, ssh_err(r));
418 send_msg(ret, msg);
419
420 sshbuf_reset(msg);
421
422 get_msg_extended(ret, msg, 1);
423
424 /* Expecting a VERSION reply */
425 if ((r = sshbuf_get_u8(msg, &type)) != 0)
426 fatal("%s: buffer error: %s", __func__, ssh_err(r));
427 if (type != SSH2_FXP_VERSION) {
428 error("Invalid packet back from SSH2_FXP_INIT (type %u)",
429 type);
430 sshbuf_free(msg);
431 free(ret);
432 return(NULL);
433 }
434 if ((r = sshbuf_get_u32(msg, &ret->version)) != 0)
435 fatal("%s: buffer error: %s", __func__, ssh_err(r));
436
437 debug2("Remote version: %u", ret->version);
438
439 /* Check for extensions */
440 while (sshbuf_len(msg) > 0) {
441 char *name;
442 u_char *value;
443 size_t vlen;
444 int known = 0;
445
446 if ((r = sshbuf_get_cstring(msg, &name, NULL)) != 0 ||
447 (r = sshbuf_get_string(msg, &value, &vlen)) != 0)
448 fatal("%s: buffer error: %s", __func__, ssh_err(r));
449 if (strcmp(name, "posix-rename@openssh.com") == 0 &&
450 strcmp((char *)value, "1") == 0) {
451 ret->exts |= SFTP_EXT_POSIX_RENAME;
452 known = 1;
453 } else if (strcmp(name, "statvfs@openssh.com") == 0 &&
454 strcmp((char *)value, "2") == 0) {
455 ret->exts |= SFTP_EXT_STATVFS;
456 known = 1;
457 } else if (strcmp(name, "fstatvfs@openssh.com") == 0 &&
458 strcmp((char *)value, "2") == 0) {
459 ret->exts |= SFTP_EXT_FSTATVFS;
460 known = 1;
461 } else if (strcmp(name, "hardlink@openssh.com") == 0 &&
462 strcmp((char *)value, "1") == 0) {
463 ret->exts |= SFTP_EXT_HARDLINK;
464 known = 1;
465 } else if (strcmp(name, "fsync@openssh.com") == 0 &&
466 strcmp((char *)value, "1") == 0) {
467 ret->exts |= SFTP_EXT_FSYNC;
468 known = 1;
469 } else if (strcmp(name, "lsetstat@openssh.com") == 0 &&
470 strcmp((char *)value, "1") == 0) {
471 ret->exts |= SFTP_EXT_LSETSTAT;
472 known = 1;
473 }
474 if (known) {
475 debug2("Server supports extension \"%s\" revision %s",
476 name, value);
477 } else {
478 debug2("Unrecognised server extension \"%s\"", name);
479 }
480 free(name);
481 free(value);
482 }
483
484 sshbuf_free(msg);
485
486 /* Some filexfer v.0 servers don't support large packets */
487 if (ret->version == 0)
488 ret->transfer_buflen = MINIMUM(ret->transfer_buflen, 20480);
489
490 ret->limit_kbps = limit_kbps;
491 if (ret->limit_kbps > 0) {
492 bandwidth_limit_init(&ret->bwlimit_in, ret->limit_kbps,
493 ret->transfer_buflen);
494 bandwidth_limit_init(&ret->bwlimit_out, ret->limit_kbps,
495 ret->transfer_buflen);
496 }
497
498 return ret;
499 }
500
501 u_int
sftp_proto_version(struct sftp_conn * conn)502 sftp_proto_version(struct sftp_conn *conn)
503 {
504 return conn->version;
505 }
506
507 int
do_close(struct sftp_conn * conn,const u_char * handle,u_int handle_len)508 do_close(struct sftp_conn *conn, const u_char *handle, u_int handle_len)
509 {
510 u_int id, status;
511 struct sshbuf *msg;
512 int r;
513
514 if ((msg = sshbuf_new()) == NULL)
515 fatal("%s: sshbuf_new failed", __func__);
516
517 id = conn->msg_id++;
518 if ((r = sshbuf_put_u8(msg, SSH2_FXP_CLOSE)) != 0 ||
519 (r = sshbuf_put_u32(msg, id)) != 0 ||
520 (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
521 fatal("%s: buffer error: %s", __func__, ssh_err(r));
522 send_msg(conn, msg);
523 debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
524
525 status = get_status(conn, id);
526 if (status != SSH2_FX_OK)
527 error("Couldn't close file: %s", fx2txt(status));
528
529 sshbuf_free(msg);
530
531 return status == SSH2_FX_OK ? 0 : -1;
532 }
533
534
535 static int
do_lsreaddir(struct sftp_conn * conn,const char * path,int print_flag,SFTP_DIRENT *** dir)536 do_lsreaddir(struct sftp_conn *conn, const char *path, int print_flag,
537 SFTP_DIRENT ***dir)
538 {
539 struct sshbuf *msg;
540 u_int count, id, i, expected_id, ents = 0;
541 size_t handle_len;
542 u_char type, *handle;
543 int status = SSH2_FX_FAILURE;
544 int r;
545
546 if (dir)
547 *dir = NULL;
548
549 id = conn->msg_id++;
550
551 if ((msg = sshbuf_new()) == NULL)
552 fatal("%s: sshbuf_new failed", __func__);
553 if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPENDIR)) != 0 ||
554 (r = sshbuf_put_u32(msg, id)) != 0 ||
555 (r = sshbuf_put_cstring(msg, path)) != 0)
556 fatal("%s: buffer error: %s", __func__, ssh_err(r));
557 send_msg(conn, msg);
558
559 handle = get_handle(conn, id, &handle_len,
560 "remote readdir(\"%s\")", path);
561 if (handle == NULL) {
562 sshbuf_free(msg);
563 return -1;
564 }
565
566 if (dir) {
567 ents = 0;
568 *dir = xcalloc(1, sizeof(**dir));
569 (*dir)[0] = NULL;
570 }
571
572 for (; !interrupted;) {
573 id = expected_id = conn->msg_id++;
574
575 debug3("Sending SSH2_FXP_READDIR I:%u", id);
576
577 sshbuf_reset(msg);
578 if ((r = sshbuf_put_u8(msg, SSH2_FXP_READDIR)) != 0 ||
579 (r = sshbuf_put_u32(msg, id)) != 0 ||
580 (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
581 fatal("%s: buffer error: %s", __func__, ssh_err(r));
582 send_msg(conn, msg);
583
584 sshbuf_reset(msg);
585
586 get_msg(conn, msg);
587
588 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
589 (r = sshbuf_get_u32(msg, &id)) != 0)
590 fatal("%s: buffer error: %s", __func__, ssh_err(r));
591
592 debug3("Received reply T:%u I:%u", type, id);
593
594 if (id != expected_id)
595 fatal("ID mismatch (%u != %u)", id, expected_id);
596
597 if (type == SSH2_FXP_STATUS) {
598 u_int rstatus;
599
600 if ((r = sshbuf_get_u32(msg, &rstatus)) != 0)
601 fatal("%s: buffer error: %s",
602 __func__, ssh_err(r));
603 debug3("Received SSH2_FXP_STATUS %d", rstatus);
604 if (rstatus == SSH2_FX_EOF)
605 break;
606 error("Couldn't read directory: %s", fx2txt(rstatus));
607 goto out;
608 } else if (type != SSH2_FXP_NAME)
609 fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
610 SSH2_FXP_NAME, type);
611
612 if ((r = sshbuf_get_u32(msg, &count)) != 0)
613 fatal("%s: buffer error: %s", __func__, ssh_err(r));
614 if (count > SSHBUF_SIZE_MAX)
615 fatal("%s: nonsensical number of entries", __func__);
616 if (count == 0)
617 break;
618 debug3("Received %d SSH2_FXP_NAME responses", count);
619 for (i = 0; i < count; i++) {
620 char *filename, *longname;
621 Attrib a;
622
623 if ((r = sshbuf_get_cstring(msg, &filename,
624 NULL)) != 0 ||
625 (r = sshbuf_get_cstring(msg, &longname,
626 NULL)) != 0)
627 fatal("%s: buffer error: %s",
628 __func__, ssh_err(r));
629 if ((r = decode_attrib(msg, &a)) != 0) {
630 error("%s: couldn't decode attrib: %s",
631 __func__, ssh_err(r));
632 free(filename);
633 free(longname);
634 goto out;
635 }
636
637 if (print_flag)
638 mprintf("%s\n", longname);
639
640 /*
641 * Directory entries should never contain '/'
642 * These can be used to attack recursive ops
643 * (e.g. send '../../../../etc/passwd')
644 */
645 if (strpbrk(filename, SFTP_DIRECTORY_CHARS) != NULL) {
646 error("Server sent suspect path \"%s\" "
647 "during readdir of \"%s\"", filename, path);
648 } else if (dir) {
649 *dir = xreallocarray(*dir, ents + 2, sizeof(**dir));
650 (*dir)[ents] = xcalloc(1, sizeof(***dir));
651 (*dir)[ents]->filename = xstrdup(filename);
652 (*dir)[ents]->longname = xstrdup(longname);
653 memcpy(&(*dir)[ents]->a, &a, sizeof(a));
654 (*dir)[++ents] = NULL;
655 }
656 free(filename);
657 free(longname);
658 }
659 }
660 status = 0;
661
662 out:
663 sshbuf_free(msg);
664 do_close(conn, handle, handle_len);
665 free(handle);
666
667 if (status != 0 && dir != NULL) {
668 /* Don't return results on error */
669 free_sftp_dirents(*dir);
670 *dir = NULL;
671 } else if (interrupted && dir != NULL && *dir != NULL) {
672 /* Don't return partial matches on interrupt */
673 free_sftp_dirents(*dir);
674 *dir = xcalloc(1, sizeof(**dir));
675 **dir = NULL;
676 }
677
678 return status == SSH2_FX_OK ? 0 : -1;
679 }
680
681 int
do_readdir(struct sftp_conn * conn,const char * path,SFTP_DIRENT *** dir)682 do_readdir(struct sftp_conn *conn, const char *path, SFTP_DIRENT ***dir)
683 {
684 return(do_lsreaddir(conn, path, 0, dir));
685 }
686
free_sftp_dirents(SFTP_DIRENT ** s)687 void free_sftp_dirents(SFTP_DIRENT **s)
688 {
689 int i;
690
691 if (s == NULL)
692 return;
693 for (i = 0; s[i]; i++) {
694 free(s[i]->filename);
695 free(s[i]->longname);
696 free(s[i]);
697 }
698 free(s);
699 }
700
701 int
do_rm(struct sftp_conn * conn,const char * path)702 do_rm(struct sftp_conn *conn, const char *path)
703 {
704 u_int status, id;
705
706 debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
707
708 id = conn->msg_id++;
709 send_string_request(conn, id, SSH2_FXP_REMOVE, path, strlen(path));
710 status = get_status(conn, id);
711 if (status != SSH2_FX_OK)
712 error("Couldn't delete file: %s", fx2txt(status));
713 return status == SSH2_FX_OK ? 0 : -1;
714 }
715
716 int
do_mkdir(struct sftp_conn * conn,const char * path,Attrib * a,int print_flag)717 do_mkdir(struct sftp_conn *conn, const char *path, Attrib *a, int print_flag)
718 {
719 u_int status, id;
720
721 id = conn->msg_id++;
722 send_string_attrs_request(conn, id, SSH2_FXP_MKDIR, path,
723 strlen(path), a);
724
725 status = get_status(conn, id);
726 if (status != SSH2_FX_OK && print_flag)
727 error("Couldn't create directory: %s", fx2txt(status));
728
729 return status == SSH2_FX_OK ? 0 : -1;
730 }
731
732 int
do_rmdir(struct sftp_conn * conn,const char * path)733 do_rmdir(struct sftp_conn *conn, const char *path)
734 {
735 u_int status, id;
736
737 id = conn->msg_id++;
738 send_string_request(conn, id, SSH2_FXP_RMDIR, path,
739 strlen(path));
740
741 status = get_status(conn, id);
742 if (status != SSH2_FX_OK)
743 error("Couldn't remove directory: %s", fx2txt(status));
744
745 return status == SSH2_FX_OK ? 0 : -1;
746 }
747
748 Attrib *
do_stat(struct sftp_conn * conn,const char * path,int quiet)749 do_stat(struct sftp_conn *conn, const char *path, int quiet)
750 {
751 u_int id;
752
753 id = conn->msg_id++;
754
755 send_string_request(conn, id,
756 conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
757 path, strlen(path));
758
759 return(get_decode_stat(conn, id, quiet));
760 }
761
762 Attrib *
do_lstat(struct sftp_conn * conn,const char * path,int quiet)763 do_lstat(struct sftp_conn *conn, const char *path, int quiet)
764 {
765 u_int id;
766
767 if (conn->version == 0) {
768 if (quiet)
769 debug("Server version does not support lstat operation");
770 else
771 logit("Server version does not support lstat operation");
772 return(do_stat(conn, path, quiet));
773 }
774
775 id = conn->msg_id++;
776 send_string_request(conn, id, SSH2_FXP_LSTAT, path,
777 strlen(path));
778
779 return(get_decode_stat(conn, id, quiet));
780 }
781
782 #ifdef notyet
783 Attrib *
do_fstat(struct sftp_conn * conn,const u_char * handle,u_int handle_len,int quiet)784 do_fstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
785 int quiet)
786 {
787 u_int id;
788
789 id = conn->msg_id++;
790 send_string_request(conn, id, SSH2_FXP_FSTAT, handle,
791 handle_len);
792
793 return(get_decode_stat(conn, id, quiet));
794 }
795 #endif
796
797 int
do_setstat(struct sftp_conn * conn,const char * path,Attrib * a)798 do_setstat(struct sftp_conn *conn, const char *path, Attrib *a)
799 {
800 u_int status, id;
801
802 id = conn->msg_id++;
803 send_string_attrs_request(conn, id, SSH2_FXP_SETSTAT, path,
804 strlen(path), a);
805
806 status = get_status(conn, id);
807 if (status != SSH2_FX_OK)
808 error("Couldn't setstat on \"%s\": %s", path,
809 fx2txt(status));
810
811 return status == SSH2_FX_OK ? 0 : -1;
812 }
813
814 int
do_fsetstat(struct sftp_conn * conn,const u_char * handle,u_int handle_len,Attrib * a)815 do_fsetstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
816 Attrib *a)
817 {
818 u_int status, id;
819
820 id = conn->msg_id++;
821 send_string_attrs_request(conn, id, SSH2_FXP_FSETSTAT, handle,
822 handle_len, a);
823
824 status = get_status(conn, id);
825 if (status != SSH2_FX_OK)
826 error("Couldn't fsetstat: %s", fx2txt(status));
827
828 return status == SSH2_FX_OK ? 0 : -1;
829 }
830
831 char *
do_realpath(struct sftp_conn * conn,const char * path)832 do_realpath(struct sftp_conn *conn, const char *path)
833 {
834 struct sshbuf *msg;
835 u_int expected_id, count, id;
836 char *filename, *longname;
837 Attrib a;
838 u_char type;
839 int r;
840
841 expected_id = id = conn->msg_id++;
842 send_string_request(conn, id, SSH2_FXP_REALPATH, path,
843 strlen(path));
844
845 if ((msg = sshbuf_new()) == NULL)
846 fatal("%s: sshbuf_new failed", __func__);
847
848 get_msg(conn, msg);
849 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
850 (r = sshbuf_get_u32(msg, &id)) != 0)
851 fatal("%s: buffer error: %s", __func__, ssh_err(r));
852
853 if (id != expected_id)
854 fatal("ID mismatch (%u != %u)", id, expected_id);
855
856 if (type == SSH2_FXP_STATUS) {
857 u_int status;
858
859 if ((r = sshbuf_get_u32(msg, &status)) != 0)
860 fatal("%s: buffer error: %s", __func__, ssh_err(r));
861 error("Couldn't canonicalize: %s", fx2txt(status));
862 sshbuf_free(msg);
863 return NULL;
864 } else if (type != SSH2_FXP_NAME)
865 fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
866 SSH2_FXP_NAME, type);
867
868 if ((r = sshbuf_get_u32(msg, &count)) != 0)
869 fatal("%s: buffer error: %s", __func__, ssh_err(r));
870 if (count != 1)
871 fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
872
873 if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 ||
874 (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 ||
875 (r = decode_attrib(msg, &a)) != 0)
876 fatal("%s: buffer error: %s", __func__, ssh_err(r));
877
878 debug3("SSH_FXP_REALPATH %s -> %s size %lu", path, filename,
879 (unsigned long)a.size);
880
881 free(longname);
882
883 sshbuf_free(msg);
884
885 return(filename);
886 }
887
888 int
do_rename(struct sftp_conn * conn,const char * oldpath,const char * newpath,int force_legacy)889 do_rename(struct sftp_conn *conn, const char *oldpath, const char *newpath,
890 int force_legacy)
891 {
892 struct sshbuf *msg;
893 u_int status, id;
894 int r, use_ext = (conn->exts & SFTP_EXT_POSIX_RENAME) && !force_legacy;
895
896 if ((msg = sshbuf_new()) == NULL)
897 fatal("%s: sshbuf_new failed", __func__);
898
899 /* Send rename request */
900 id = conn->msg_id++;
901 if (use_ext) {
902 if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
903 (r = sshbuf_put_u32(msg, id)) != 0 ||
904 (r = sshbuf_put_cstring(msg,
905 "posix-rename@openssh.com")) != 0)
906 fatal("%s: buffer error: %s", __func__, ssh_err(r));
907 } else {
908 if ((r = sshbuf_put_u8(msg, SSH2_FXP_RENAME)) != 0 ||
909 (r = sshbuf_put_u32(msg, id)) != 0)
910 fatal("%s: buffer error: %s", __func__, ssh_err(r));
911 }
912 if ((r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
913 (r = sshbuf_put_cstring(msg, newpath)) != 0)
914 fatal("%s: buffer error: %s", __func__, ssh_err(r));
915 send_msg(conn, msg);
916 debug3("Sent message %s \"%s\" -> \"%s\"",
917 use_ext ? "posix-rename@openssh.com" :
918 "SSH2_FXP_RENAME", oldpath, newpath);
919 sshbuf_free(msg);
920
921 status = get_status(conn, id);
922 if (status != SSH2_FX_OK)
923 error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
924 newpath, fx2txt(status));
925
926 return status == SSH2_FX_OK ? 0 : -1;
927 }
928
929 int
do_hardlink(struct sftp_conn * conn,const char * oldpath,const char * newpath)930 do_hardlink(struct sftp_conn *conn, const char *oldpath, const char *newpath)
931 {
932 struct sshbuf *msg;
933 u_int status, id;
934 int r;
935
936 if ((conn->exts & SFTP_EXT_HARDLINK) == 0) {
937 error("Server does not support hardlink@openssh.com extension");
938 return -1;
939 }
940
941 if ((msg = sshbuf_new()) == NULL)
942 fatal("%s: sshbuf_new failed", __func__);
943
944 /* Send link request */
945 id = conn->msg_id++;
946 if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
947 (r = sshbuf_put_u32(msg, id)) != 0 ||
948 (r = sshbuf_put_cstring(msg, "hardlink@openssh.com")) != 0 ||
949 (r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
950 (r = sshbuf_put_cstring(msg, newpath)) != 0)
951 fatal("%s: buffer error: %s", __func__, ssh_err(r));
952 send_msg(conn, msg);
953 debug3("Sent message hardlink@openssh.com \"%s\" -> \"%s\"",
954 oldpath, newpath);
955 sshbuf_free(msg);
956
957 status = get_status(conn, id);
958 if (status != SSH2_FX_OK)
959 error("Couldn't link file \"%s\" to \"%s\": %s", oldpath,
960 newpath, fx2txt(status));
961
962 return status == SSH2_FX_OK ? 0 : -1;
963 }
964
965 int
do_symlink(struct sftp_conn * conn,const char * oldpath,const char * newpath)966 do_symlink(struct sftp_conn *conn, const char *oldpath, const char *newpath)
967 {
968 struct sshbuf *msg;
969 u_int status, id;
970 int r;
971
972 if (conn->version < 3) {
973 error("This server does not support the symlink operation");
974 return(SSH2_FX_OP_UNSUPPORTED);
975 }
976
977 if ((msg = sshbuf_new()) == NULL)
978 fatal("%s: sshbuf_new failed", __func__);
979
980 /* Send symlink request */
981 id = conn->msg_id++;
982 if ((r = sshbuf_put_u8(msg, SSH2_FXP_SYMLINK)) != 0 ||
983 (r = sshbuf_put_u32(msg, id)) != 0 ||
984 (r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
985 (r = sshbuf_put_cstring(msg, newpath)) != 0)
986 fatal("%s: buffer error: %s", __func__, ssh_err(r));
987 send_msg(conn, msg);
988 debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
989 newpath);
990 sshbuf_free(msg);
991
992 status = get_status(conn, id);
993 if (status != SSH2_FX_OK)
994 error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
995 newpath, fx2txt(status));
996
997 return status == SSH2_FX_OK ? 0 : -1;
998 }
999
1000 int
do_fsync(struct sftp_conn * conn,u_char * handle,u_int handle_len)1001 do_fsync(struct sftp_conn *conn, u_char *handle, u_int handle_len)
1002 {
1003 struct sshbuf *msg;
1004 u_int status, id;
1005 int r;
1006
1007 /* Silently return if the extension is not supported */
1008 if ((conn->exts & SFTP_EXT_FSYNC) == 0)
1009 return -1;
1010
1011 /* Send fsync request */
1012 if ((msg = sshbuf_new()) == NULL)
1013 fatal("%s: sshbuf_new failed", __func__);
1014 id = conn->msg_id++;
1015 if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
1016 (r = sshbuf_put_u32(msg, id)) != 0 ||
1017 (r = sshbuf_put_cstring(msg, "fsync@openssh.com")) != 0 ||
1018 (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
1019 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1020 send_msg(conn, msg);
1021 debug3("Sent message fsync@openssh.com I:%u", id);
1022 sshbuf_free(msg);
1023
1024 status = get_status(conn, id);
1025 if (status != SSH2_FX_OK)
1026 error("Couldn't sync file: %s", fx2txt(status));
1027
1028 return status == SSH2_FX_OK ? 0 : -1;
1029 }
1030
1031 #ifdef notyet
1032 char *
do_readlink(struct sftp_conn * conn,const char * path)1033 do_readlink(struct sftp_conn *conn, const char *path)
1034 {
1035 struct sshbuf *msg;
1036 u_int expected_id, count, id;
1037 char *filename, *longname;
1038 Attrib a;
1039 u_char type;
1040 int r;
1041
1042 expected_id = id = conn->msg_id++;
1043 send_string_request(conn, id, SSH2_FXP_READLINK, path, strlen(path));
1044
1045 if ((msg = sshbuf_new()) == NULL)
1046 fatal("%s: sshbuf_new failed", __func__);
1047
1048 get_msg(conn, msg);
1049 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
1050 (r = sshbuf_get_u32(msg, &id)) != 0)
1051 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1052
1053 if (id != expected_id)
1054 fatal("ID mismatch (%u != %u)", id, expected_id);
1055
1056 if (type == SSH2_FXP_STATUS) {
1057 u_int status;
1058
1059 if ((r = sshbuf_get_u32(msg, &status)) != 0)
1060 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1061 error("Couldn't readlink: %s", fx2txt(status));
1062 sshbuf_free(msg);
1063 return(NULL);
1064 } else if (type != SSH2_FXP_NAME)
1065 fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1066 SSH2_FXP_NAME, type);
1067
1068 if ((r = sshbuf_get_u32(msg, &count)) != 0)
1069 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1070 if (count != 1)
1071 fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
1072
1073 if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 ||
1074 (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 ||
1075 (r = decode_attrib(msg, &a)) != 0)
1076 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1077
1078 debug3("SSH_FXP_READLINK %s -> %s", path, filename);
1079
1080 free(longname);
1081
1082 sshbuf_free(msg);
1083
1084 return filename;
1085 }
1086 #endif
1087
1088 int
do_statvfs(struct sftp_conn * conn,const char * path,struct sftp_statvfs * st,int quiet)1089 do_statvfs(struct sftp_conn *conn, const char *path, struct sftp_statvfs *st,
1090 int quiet)
1091 {
1092 struct sshbuf *msg;
1093 u_int id;
1094 int r;
1095
1096 if ((conn->exts & SFTP_EXT_STATVFS) == 0) {
1097 error("Server does not support statvfs@openssh.com extension");
1098 return -1;
1099 }
1100
1101 id = conn->msg_id++;
1102
1103 if ((msg = sshbuf_new()) == NULL)
1104 fatal("%s: sshbuf_new failed", __func__);
1105 if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
1106 (r = sshbuf_put_u32(msg, id)) != 0 ||
1107 (r = sshbuf_put_cstring(msg, "statvfs@openssh.com")) != 0 ||
1108 (r = sshbuf_put_cstring(msg, path)) != 0)
1109 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1110 send_msg(conn, msg);
1111 sshbuf_free(msg);
1112
1113 return get_decode_statvfs(conn, st, id, quiet);
1114 }
1115
1116 #ifdef notyet
1117 int
do_fstatvfs(struct sftp_conn * conn,const u_char * handle,u_int handle_len,struct sftp_statvfs * st,int quiet)1118 do_fstatvfs(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
1119 struct sftp_statvfs *st, int quiet)
1120 {
1121 struct sshbuf *msg;
1122 u_int id;
1123
1124 if ((conn->exts & SFTP_EXT_FSTATVFS) == 0) {
1125 error("Server does not support fstatvfs@openssh.com extension");
1126 return -1;
1127 }
1128
1129 id = conn->msg_id++;
1130
1131 if ((msg = sshbuf_new()) == NULL)
1132 fatal("%s: sshbuf_new failed", __func__);
1133 if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
1134 (r = sshbuf_put_u32(msg, id)) != 0 ||
1135 (r = sshbuf_put_cstring(msg, "fstatvfs@openssh.com")) != 0 ||
1136 (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
1137 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1138 send_msg(conn, msg);
1139 sshbuf_free(msg);
1140
1141 return get_decode_statvfs(conn, st, id, quiet);
1142 }
1143 #endif
1144
1145 int
do_lsetstat(struct sftp_conn * conn,const char * path,Attrib * a)1146 do_lsetstat(struct sftp_conn *conn, const char *path, Attrib *a)
1147 {
1148 struct sshbuf *msg;
1149 u_int status, id;
1150 int r;
1151
1152 if ((conn->exts & SFTP_EXT_LSETSTAT) == 0) {
1153 error("Server does not support lsetstat@openssh.com extension");
1154 return -1;
1155 }
1156
1157 id = conn->msg_id++;
1158 if ((msg = sshbuf_new()) == NULL)
1159 fatal("%s: sshbuf_new failed", __func__);
1160 if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
1161 (r = sshbuf_put_u32(msg, id)) != 0 ||
1162 (r = sshbuf_put_cstring(msg, "lsetstat@openssh.com")) != 0 ||
1163 (r = sshbuf_put_cstring(msg, path)) != 0 ||
1164 (r = encode_attrib(msg, a)) != 0)
1165 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1166 send_msg(conn, msg);
1167 sshbuf_free(msg);
1168
1169 status = get_status(conn, id);
1170 if (status != SSH2_FX_OK)
1171 error("Couldn't setstat on \"%s\": %s", path,
1172 fx2txt(status));
1173
1174 return status == SSH2_FX_OK ? 0 : -1;
1175 }
1176
1177 static void
send_read_request(struct sftp_conn * conn,u_int id,u_int64_t offset,u_int len,const u_char * handle,u_int handle_len)1178 send_read_request(struct sftp_conn *conn, u_int id, u_int64_t offset,
1179 u_int len, const u_char *handle, u_int handle_len)
1180 {
1181 struct sshbuf *msg;
1182 int r;
1183
1184 if ((msg = sshbuf_new()) == NULL)
1185 fatal("%s: sshbuf_new failed", __func__);
1186 if ((r = sshbuf_put_u8(msg, SSH2_FXP_READ)) != 0 ||
1187 (r = sshbuf_put_u32(msg, id)) != 0 ||
1188 (r = sshbuf_put_string(msg, handle, handle_len)) != 0 ||
1189 (r = sshbuf_put_u64(msg, offset)) != 0 ||
1190 (r = sshbuf_put_u32(msg, len)) != 0)
1191 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1192 send_msg(conn, msg);
1193 sshbuf_free(msg);
1194 }
1195
1196 int
do_download(struct sftp_conn * conn,const char * remote_path,const char * local_path,Attrib * a,int preserve_flag,int resume_flag,int fsync_flag)1197 do_download(struct sftp_conn *conn, const char *remote_path,
1198 const char *local_path, Attrib *a, int preserve_flag, int resume_flag,
1199 int fsync_flag)
1200 {
1201 Attrib junk;
1202 struct sshbuf *msg;
1203 u_char *handle;
1204 int local_fd = -1, write_error;
1205 int read_error, write_errno, lmodified = 0, reordered = 0, r;
1206 u_int64_t offset = 0, size, highwater;
1207 u_int mode, id, buflen, num_req, max_req, status = SSH2_FX_OK;
1208 off_t progress_counter;
1209 size_t handle_len;
1210 struct stat st;
1211 struct request {
1212 u_int id;
1213 size_t len;
1214 u_int64_t offset;
1215 TAILQ_ENTRY(request) tq;
1216 };
1217 TAILQ_HEAD(reqhead, request) requests;
1218 struct request *req;
1219 u_char type;
1220
1221 TAILQ_INIT(&requests);
1222
1223 if (a == NULL && (a = do_stat(conn, remote_path, 0)) == NULL)
1224 return -1;
1225
1226 /* Do not preserve set[ug]id here, as we do not preserve ownership */
1227 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1228 mode = a->perm & 0777;
1229 else
1230 mode = 0666;
1231
1232 if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1233 (!S_ISREG(a->perm))) {
1234 error("Cannot download non-regular file: %s", remote_path);
1235 return(-1);
1236 }
1237
1238 if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
1239 size = a->size;
1240 else
1241 size = 0;
1242
1243 buflen = conn->transfer_buflen;
1244 if ((msg = sshbuf_new()) == NULL)
1245 fatal("%s: sshbuf_new failed", __func__);
1246
1247 attrib_clear(&junk); /* Send empty attributes */
1248
1249 /* Send open request */
1250 id = conn->msg_id++;
1251 if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 ||
1252 (r = sshbuf_put_u32(msg, id)) != 0 ||
1253 (r = sshbuf_put_cstring(msg, remote_path)) != 0 ||
1254 (r = sshbuf_put_u32(msg, SSH2_FXF_READ)) != 0 ||
1255 (r = encode_attrib(msg, &junk)) != 0)
1256 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1257 send_msg(conn, msg);
1258 debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1259
1260 handle = get_handle(conn, id, &handle_len,
1261 "remote open(\"%s\")", remote_path);
1262 if (handle == NULL) {
1263 sshbuf_free(msg);
1264 return(-1);
1265 }
1266
1267 local_fd = open(local_path,
1268 O_WRONLY | O_CREAT | (resume_flag ? 0 : O_TRUNC), mode | S_IWUSR);
1269 if (local_fd == -1) {
1270 error("Couldn't open local file \"%s\" for writing: %s",
1271 local_path, strerror(errno));
1272 goto fail;
1273 }
1274 offset = highwater = 0;
1275 if (resume_flag) {
1276 if (fstat(local_fd, &st) == -1) {
1277 error("Unable to stat local file \"%s\": %s",
1278 local_path, strerror(errno));
1279 goto fail;
1280 }
1281 if (st.st_size < 0) {
1282 error("\"%s\" has negative size", local_path);
1283 goto fail;
1284 }
1285 if ((u_int64_t)st.st_size > size) {
1286 error("Unable to resume download of \"%s\": "
1287 "local file is larger than remote", local_path);
1288 fail:
1289 do_close(conn, handle, handle_len);
1290 sshbuf_free(msg);
1291 free(handle);
1292 if (local_fd != -1)
1293 close(local_fd);
1294 return -1;
1295 }
1296 offset = highwater = st.st_size;
1297 }
1298
1299 /* Read from remote and write to local */
1300 write_error = read_error = write_errno = num_req = 0;
1301 max_req = 1;
1302 progress_counter = offset;
1303
1304 if (showprogress && size != 0)
1305 start_progress_meter(remote_path, size, &progress_counter);
1306
1307 while (num_req > 0 || max_req > 0) {
1308 u_char *data;
1309 size_t len;
1310
1311 /*
1312 * Simulate EOF on interrupt: stop sending new requests and
1313 * allow outstanding requests to drain gracefully
1314 */
1315 if (interrupted) {
1316 if (num_req == 0) /* If we haven't started yet... */
1317 break;
1318 max_req = 0;
1319 }
1320
1321 /* Send some more requests */
1322 while (num_req < max_req) {
1323 debug3("Request range %llu -> %llu (%d/%d)",
1324 (unsigned long long)offset,
1325 (unsigned long long)offset + buflen - 1,
1326 num_req, max_req);
1327 req = xcalloc(1, sizeof(*req));
1328 req->id = conn->msg_id++;
1329 req->len = buflen;
1330 req->offset = offset;
1331 offset += buflen;
1332 num_req++;
1333 TAILQ_INSERT_TAIL(&requests, req, tq);
1334 send_read_request(conn, req->id, req->offset,
1335 req->len, handle, handle_len);
1336 }
1337
1338 sshbuf_reset(msg);
1339 get_msg(conn, msg);
1340 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
1341 (r = sshbuf_get_u32(msg, &id)) != 0)
1342 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1343 debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1344
1345 /* Find the request in our queue */
1346 for (req = TAILQ_FIRST(&requests);
1347 req != NULL && req->id != id;
1348 req = TAILQ_NEXT(req, tq))
1349 ;
1350 if (req == NULL)
1351 fatal("Unexpected reply %u", id);
1352
1353 switch (type) {
1354 case SSH2_FXP_STATUS:
1355 if ((r = sshbuf_get_u32(msg, &status)) != 0)
1356 fatal("%s: buffer error: %s",
1357 __func__, ssh_err(r));
1358 if (status != SSH2_FX_EOF)
1359 read_error = 1;
1360 max_req = 0;
1361 TAILQ_REMOVE(&requests, req, tq);
1362 free(req);
1363 num_req--;
1364 break;
1365 case SSH2_FXP_DATA:
1366 if ((r = sshbuf_get_string(msg, &data, &len)) != 0)
1367 fatal("%s: buffer error: %s",
1368 __func__, ssh_err(r));
1369 debug3("Received data %llu -> %llu",
1370 (unsigned long long)req->offset,
1371 (unsigned long long)req->offset + len - 1);
1372 if (len > req->len)
1373 fatal("Received more data than asked for "
1374 "%zu > %zu", len, req->len);
1375 lmodified = 1;
1376 if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1377 atomicio(vwrite, local_fd, data, len) != len) &&
1378 !write_error) {
1379 write_errno = errno;
1380 write_error = 1;
1381 max_req = 0;
1382 }
1383 else if (!reordered && req->offset <= highwater)
1384 highwater = req->offset + len;
1385 else if (!reordered && req->offset > highwater)
1386 reordered = 1;
1387 progress_counter += len;
1388 free(data);
1389
1390 if (len == req->len) {
1391 TAILQ_REMOVE(&requests, req, tq);
1392 free(req);
1393 num_req--;
1394 } else {
1395 /* Resend the request for the missing data */
1396 debug3("Short data block, re-requesting "
1397 "%llu -> %llu (%2d)",
1398 (unsigned long long)req->offset + len,
1399 (unsigned long long)req->offset +
1400 req->len - 1, num_req);
1401 req->id = conn->msg_id++;
1402 req->len -= len;
1403 req->offset += len;
1404 send_read_request(conn, req->id,
1405 req->offset, req->len, handle, handle_len);
1406 /* Reduce the request size */
1407 if (len < buflen)
1408 buflen = MAXIMUM(MIN_READ_SIZE, len);
1409 }
1410 if (max_req > 0) { /* max_req = 0 iff EOF received */
1411 if (size > 0 && offset > size) {
1412 /* Only one request at a time
1413 * after the expected EOF */
1414 debug3("Finish at %llu (%2d)",
1415 (unsigned long long)offset,
1416 num_req);
1417 max_req = 1;
1418 } else if (max_req <= conn->num_requests) {
1419 ++max_req;
1420 }
1421 }
1422 break;
1423 default:
1424 fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1425 SSH2_FXP_DATA, type);
1426 }
1427 }
1428
1429 if (showprogress && size)
1430 stop_progress_meter();
1431
1432 /* Sanity check */
1433 if (TAILQ_FIRST(&requests) != NULL)
1434 fatal("Transfer complete, but requests still in queue");
1435 /* Truncate at highest contiguous point to avoid holes on interrupt */
1436 if (read_error || write_error || interrupted) {
1437 if (reordered && resume_flag) {
1438 error("Unable to resume download of \"%s\": "
1439 "server reordered requests", local_path);
1440 }
1441 debug("truncating at %llu", (unsigned long long)highwater);
1442 if (ftruncate(local_fd, highwater) == -1)
1443 error("ftruncate \"%s\": %s", local_path,
1444 strerror(errno));
1445 }
1446 if (read_error) {
1447 error("Couldn't read from remote file \"%s\" : %s",
1448 remote_path, fx2txt(status));
1449 status = -1;
1450 do_close(conn, handle, handle_len);
1451 } else if (write_error) {
1452 error("Couldn't write to \"%s\": %s", local_path,
1453 strerror(write_errno));
1454 status = SSH2_FX_FAILURE;
1455 do_close(conn, handle, handle_len);
1456 } else {
1457 if (do_close(conn, handle, handle_len) != 0 || interrupted)
1458 status = SSH2_FX_FAILURE;
1459 else
1460 status = SSH2_FX_OK;
1461 /* Override umask and utimes if asked */
1462 #ifdef HAVE_FCHMOD
1463 if (preserve_flag && fchmod(local_fd, mode) == -1)
1464 #else
1465 if (preserve_flag && chmod(local_path, mode) == -1)
1466 #endif /* HAVE_FCHMOD */
1467 error("Couldn't set mode on \"%s\": %s", local_path,
1468 strerror(errno));
1469 if (preserve_flag &&
1470 (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
1471 struct timeval tv[2];
1472 tv[0].tv_sec = a->atime;
1473 tv[1].tv_sec = a->mtime;
1474 tv[0].tv_usec = tv[1].tv_usec = 0;
1475 if (utimes(local_path, tv) == -1)
1476 error("Can't set times on \"%s\": %s",
1477 local_path, strerror(errno));
1478 }
1479 if (resume_flag && !lmodified)
1480 logit("File \"%s\" was not modified", local_path);
1481 else if (fsync_flag) {
1482 debug("syncing \"%s\"", local_path);
1483 if (fsync(local_fd) == -1)
1484 error("Couldn't sync file \"%s\": %s",
1485 local_path, strerror(errno));
1486 }
1487 }
1488 close(local_fd);
1489 sshbuf_free(msg);
1490 free(handle);
1491
1492 return status == SSH2_FX_OK ? 0 : -1;
1493 }
1494
1495 static int
download_dir_internal(struct sftp_conn * conn,const char * src,const char * dst,int depth,Attrib * dirattrib,int preserve_flag,int print_flag,int resume_flag,int fsync_flag)1496 download_dir_internal(struct sftp_conn *conn, const char *src, const char *dst,
1497 int depth, Attrib *dirattrib, int preserve_flag, int print_flag,
1498 int resume_flag, int fsync_flag)
1499 {
1500 int i, ret = 0;
1501 SFTP_DIRENT **dir_entries;
1502 char *filename, *new_src = NULL, *new_dst = NULL;
1503 mode_t mode = 0777;
1504
1505 if (depth >= MAX_DIR_DEPTH) {
1506 error("Maximum directory depth exceeded: %d levels", depth);
1507 return -1;
1508 }
1509
1510 if (dirattrib == NULL &&
1511 (dirattrib = do_stat(conn, src, 1)) == NULL) {
1512 error("Unable to stat remote directory \"%s\"", src);
1513 return -1;
1514 }
1515 if (!S_ISDIR(dirattrib->perm)) {
1516 error("\"%s\" is not a directory", src);
1517 return -1;
1518 }
1519 if (print_flag)
1520 mprintf("Retrieving %s\n", src);
1521
1522 if (dirattrib->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1523 mode = dirattrib->perm & 01777;
1524 else {
1525 debug("Server did not send permissions for "
1526 "directory \"%s\"", dst);
1527 }
1528
1529 if (mkdir(dst, mode) == -1 && errno != EEXIST) {
1530 error("mkdir %s: %s", dst, strerror(errno));
1531 return -1;
1532 }
1533
1534 if (do_readdir(conn, src, &dir_entries) == -1) {
1535 error("%s: Failed to get directory contents", src);
1536 return -1;
1537 }
1538
1539 for (i = 0; dir_entries[i] != NULL && !interrupted; i++) {
1540 free(new_dst);
1541 free(new_src);
1542
1543 filename = dir_entries[i]->filename;
1544 new_dst = path_append(dst, filename);
1545 new_src = path_append(src, filename);
1546
1547 if (S_ISDIR(dir_entries[i]->a.perm)) {
1548 if (strcmp(filename, ".") == 0 ||
1549 strcmp(filename, "..") == 0)
1550 continue;
1551 if (download_dir_internal(conn, new_src, new_dst,
1552 depth + 1, &(dir_entries[i]->a), preserve_flag,
1553 print_flag, resume_flag, fsync_flag) == -1)
1554 ret = -1;
1555 } else if (S_ISREG(dir_entries[i]->a.perm) ) {
1556 if (do_download(conn, new_src, new_dst,
1557 &(dir_entries[i]->a), preserve_flag,
1558 resume_flag, fsync_flag) == -1) {
1559 error("Download of file %s to %s failed",
1560 new_src, new_dst);
1561 ret = -1;
1562 }
1563 } else
1564 logit("%s: not a regular file\n", new_src);
1565
1566 }
1567 free(new_dst);
1568 free(new_src);
1569
1570 if (preserve_flag) {
1571 if (dirattrib->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
1572 struct timeval tv[2];
1573 tv[0].tv_sec = dirattrib->atime;
1574 tv[1].tv_sec = dirattrib->mtime;
1575 tv[0].tv_usec = tv[1].tv_usec = 0;
1576 if (utimes(dst, tv) == -1)
1577 error("Can't set times on \"%s\": %s",
1578 dst, strerror(errno));
1579 } else
1580 debug("Server did not send times for directory "
1581 "\"%s\"", dst);
1582 }
1583
1584 free_sftp_dirents(dir_entries);
1585
1586 return ret;
1587 }
1588
1589 int
download_dir(struct sftp_conn * conn,const char * src,const char * dst,Attrib * dirattrib,int preserve_flag,int print_flag,int resume_flag,int fsync_flag)1590 download_dir(struct sftp_conn *conn, const char *src, const char *dst,
1591 Attrib *dirattrib, int preserve_flag, int print_flag, int resume_flag,
1592 int fsync_flag)
1593 {
1594 char *src_canon;
1595 int ret;
1596
1597 if ((src_canon = do_realpath(conn, src)) == NULL) {
1598 error("Unable to canonicalize path \"%s\"", src);
1599 return -1;
1600 }
1601
1602 ret = download_dir_internal(conn, src_canon, dst, 0,
1603 dirattrib, preserve_flag, print_flag, resume_flag, fsync_flag);
1604 free(src_canon);
1605 return ret;
1606 }
1607
1608 int
do_upload(struct sftp_conn * conn,const char * local_path,const char * remote_path,int preserve_flag,int resume,int fsync_flag)1609 do_upload(struct sftp_conn *conn, const char *local_path,
1610 const char *remote_path, int preserve_flag, int resume, int fsync_flag)
1611 {
1612 int r, local_fd;
1613 u_int status = SSH2_FX_OK;
1614 u_int id;
1615 u_char type;
1616 off_t offset, progress_counter;
1617 u_char *handle, *data;
1618 struct sshbuf *msg;
1619 struct stat sb;
1620 Attrib a, *c = NULL;
1621 u_int32_t startid;
1622 u_int32_t ackid;
1623 struct outstanding_ack {
1624 u_int id;
1625 u_int len;
1626 off_t offset;
1627 TAILQ_ENTRY(outstanding_ack) tq;
1628 };
1629 TAILQ_HEAD(ackhead, outstanding_ack) acks;
1630 struct outstanding_ack *ack = NULL;
1631 size_t handle_len;
1632
1633 TAILQ_INIT(&acks);
1634
1635 if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1636 error("Couldn't open local file \"%s\" for reading: %s",
1637 local_path, strerror(errno));
1638 return(-1);
1639 }
1640 if (fstat(local_fd, &sb) == -1) {
1641 error("Couldn't fstat local file \"%s\": %s",
1642 local_path, strerror(errno));
1643 close(local_fd);
1644 return(-1);
1645 }
1646 if (!S_ISREG(sb.st_mode)) {
1647 error("%s is not a regular file", local_path);
1648 close(local_fd);
1649 return(-1);
1650 }
1651 stat_to_attrib(&sb, &a);
1652
1653 a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1654 a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1655 a.perm &= 0777;
1656 if (!preserve_flag)
1657 a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1658
1659 if (resume) {
1660 /* Get remote file size if it exists */
1661 if ((c = do_stat(conn, remote_path, 0)) == NULL) {
1662 close(local_fd);
1663 return -1;
1664 }
1665
1666 if ((off_t)c->size >= sb.st_size) {
1667 error("destination file bigger or same size as "
1668 "source file");
1669 close(local_fd);
1670 return -1;
1671 }
1672
1673 if (lseek(local_fd, (off_t)c->size, SEEK_SET) == -1) {
1674 close(local_fd);
1675 return -1;
1676 }
1677 }
1678
1679 if ((msg = sshbuf_new()) == NULL)
1680 fatal("%s: sshbuf_new failed", __func__);
1681
1682 /* Send open request */
1683 id = conn->msg_id++;
1684 if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 ||
1685 (r = sshbuf_put_u32(msg, id)) != 0 ||
1686 (r = sshbuf_put_cstring(msg, remote_path)) != 0 ||
1687 (r = sshbuf_put_u32(msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|
1688 (resume ? SSH2_FXF_APPEND : SSH2_FXF_TRUNC))) != 0 ||
1689 (r = encode_attrib(msg, &a)) != 0)
1690 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1691 send_msg(conn, msg);
1692 debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1693
1694 sshbuf_reset(msg);
1695
1696 handle = get_handle(conn, id, &handle_len,
1697 "remote open(\"%s\")", remote_path);
1698 if (handle == NULL) {
1699 close(local_fd);
1700 sshbuf_free(msg);
1701 return -1;
1702 }
1703
1704 startid = ackid = id + 1;
1705 data = xmalloc(conn->transfer_buflen);
1706
1707 /* Read from local and write to remote */
1708 offset = progress_counter = (resume ? c->size : 0);
1709 if (showprogress)
1710 start_progress_meter(local_path, sb.st_size,
1711 &progress_counter);
1712
1713 for (;;) {
1714 int len;
1715
1716 /*
1717 * Can't use atomicio here because it returns 0 on EOF,
1718 * thus losing the last block of the file.
1719 * Simulate an EOF on interrupt, allowing ACKs from the
1720 * server to drain.
1721 */
1722 if (interrupted || status != SSH2_FX_OK)
1723 len = 0;
1724 else do
1725 len = read(local_fd, data, conn->transfer_buflen);
1726 while ((len == -1) &&
1727 (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
1728
1729 if (len == -1)
1730 fatal("Couldn't read from \"%s\": %s", local_path,
1731 strerror(errno));
1732
1733 if (len != 0) {
1734 ack = xcalloc(1, sizeof(*ack));
1735 ack->id = ++id;
1736 ack->offset = offset;
1737 ack->len = len;
1738 TAILQ_INSERT_TAIL(&acks, ack, tq);
1739
1740 sshbuf_reset(msg);
1741 if ((r = sshbuf_put_u8(msg, SSH2_FXP_WRITE)) != 0 ||
1742 (r = sshbuf_put_u32(msg, ack->id)) != 0 ||
1743 (r = sshbuf_put_string(msg, handle,
1744 handle_len)) != 0 ||
1745 (r = sshbuf_put_u64(msg, offset)) != 0 ||
1746 (r = sshbuf_put_string(msg, data, len)) != 0)
1747 fatal("%s: buffer error: %s",
1748 __func__, ssh_err(r));
1749 send_msg(conn, msg);
1750 debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1751 id, (unsigned long long)offset, len);
1752 } else if (TAILQ_FIRST(&acks) == NULL)
1753 break;
1754
1755 if (ack == NULL)
1756 fatal("Unexpected ACK %u", id);
1757
1758 if (id == startid || len == 0 ||
1759 id - ackid >= conn->num_requests) {
1760 u_int rid;
1761
1762 sshbuf_reset(msg);
1763 get_msg(conn, msg);
1764 if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
1765 (r = sshbuf_get_u32(msg, &rid)) != 0)
1766 fatal("%s: buffer error: %s",
1767 __func__, ssh_err(r));
1768
1769 if (type != SSH2_FXP_STATUS)
1770 fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1771 "got %d", SSH2_FXP_STATUS, type);
1772
1773 if ((r = sshbuf_get_u32(msg, &status)) != 0)
1774 fatal("%s: buffer error: %s",
1775 __func__, ssh_err(r));
1776 debug3("SSH2_FXP_STATUS %u", status);
1777
1778 /* Find the request in our queue */
1779 for (ack = TAILQ_FIRST(&acks);
1780 ack != NULL && ack->id != rid;
1781 ack = TAILQ_NEXT(ack, tq))
1782 ;
1783 if (ack == NULL)
1784 fatal("Can't find request for ID %u", rid);
1785 TAILQ_REMOVE(&acks, ack, tq);
1786 debug3("In write loop, ack for %u %u bytes at %lld",
1787 ack->id, ack->len, (long long)ack->offset);
1788 ++ackid;
1789 progress_counter += ack->len;
1790 free(ack);
1791 }
1792 offset += len;
1793 if (offset < 0)
1794 fatal("%s: offset < 0", __func__);
1795 }
1796 sshbuf_free(msg);
1797
1798 if (showprogress)
1799 stop_progress_meter();
1800 free(data);
1801
1802 if (status != SSH2_FX_OK) {
1803 error("Couldn't write to remote file \"%s\": %s",
1804 remote_path, fx2txt(status));
1805 status = SSH2_FX_FAILURE;
1806 }
1807
1808 if (close(local_fd) == -1) {
1809 error("Couldn't close local file \"%s\": %s", local_path,
1810 strerror(errno));
1811 status = SSH2_FX_FAILURE;
1812 }
1813
1814 /* Override umask and utimes if asked */
1815 if (preserve_flag)
1816 do_fsetstat(conn, handle, handle_len, &a);
1817
1818 if (fsync_flag)
1819 (void)do_fsync(conn, handle, handle_len);
1820
1821 if (do_close(conn, handle, handle_len) != 0)
1822 status = SSH2_FX_FAILURE;
1823
1824 free(handle);
1825
1826 return status == SSH2_FX_OK ? 0 : -1;
1827 }
1828
1829 static int
upload_dir_internal(struct sftp_conn * conn,const char * src,const char * dst,int depth,int preserve_flag,int print_flag,int resume,int fsync_flag)1830 upload_dir_internal(struct sftp_conn *conn, const char *src, const char *dst,
1831 int depth, int preserve_flag, int print_flag, int resume, int fsync_flag)
1832 {
1833 int ret = 0;
1834 DIR *dirp;
1835 struct dirent *dp;
1836 char *filename, *new_src = NULL, *new_dst = NULL;
1837 struct stat sb;
1838 Attrib a, *dirattrib;
1839
1840 if (depth >= MAX_DIR_DEPTH) {
1841 error("Maximum directory depth exceeded: %d levels", depth);
1842 return -1;
1843 }
1844
1845 if (stat(src, &sb) == -1) {
1846 error("Couldn't stat directory \"%s\": %s",
1847 src, strerror(errno));
1848 return -1;
1849 }
1850 if (!S_ISDIR(sb.st_mode)) {
1851 error("\"%s\" is not a directory", src);
1852 return -1;
1853 }
1854 if (print_flag)
1855 mprintf("Entering %s\n", src);
1856
1857 attrib_clear(&a);
1858 stat_to_attrib(&sb, &a);
1859 a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1860 a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1861 a.perm &= 01777;
1862 if (!preserve_flag)
1863 a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1864
1865 /*
1866 * sftp lacks a portable status value to match errno EEXIST,
1867 * so if we get a failure back then we must check whether
1868 * the path already existed and is a directory.
1869 */
1870 if (do_mkdir(conn, dst, &a, 0) != 0) {
1871 if ((dirattrib = do_stat(conn, dst, 0)) == NULL)
1872 return -1;
1873 if (!S_ISDIR(dirattrib->perm)) {
1874 error("\"%s\" exists but is not a directory", dst);
1875 return -1;
1876 }
1877 }
1878
1879 if ((dirp = opendir(src)) == NULL) {
1880 error("Failed to open dir \"%s\": %s", src, strerror(errno));
1881 return -1;
1882 }
1883
1884 while (((dp = readdir(dirp)) != NULL) && !interrupted) {
1885 if (dp->d_ino == 0)
1886 continue;
1887 free(new_dst);
1888 free(new_src);
1889 filename = dp->d_name;
1890 new_dst = path_append(dst, filename);
1891 new_src = path_append(src, filename);
1892
1893 if (lstat(new_src, &sb) == -1) {
1894 logit("%s: lstat failed: %s", filename,
1895 strerror(errno));
1896 ret = -1;
1897 } else if (S_ISDIR(sb.st_mode)) {
1898 if (strcmp(filename, ".") == 0 ||
1899 strcmp(filename, "..") == 0)
1900 continue;
1901
1902 if (upload_dir_internal(conn, new_src, new_dst,
1903 depth + 1, preserve_flag, print_flag, resume,
1904 fsync_flag) == -1)
1905 ret = -1;
1906 } else if (S_ISREG(sb.st_mode)) {
1907 if (do_upload(conn, new_src, new_dst,
1908 preserve_flag, resume, fsync_flag) == -1) {
1909 error("Uploading of file %s to %s failed!",
1910 new_src, new_dst);
1911 ret = -1;
1912 }
1913 } else
1914 logit("%s: not a regular file\n", filename);
1915 }
1916 free(new_dst);
1917 free(new_src);
1918
1919 do_setstat(conn, dst, &a);
1920
1921 (void) closedir(dirp);
1922 return ret;
1923 }
1924
1925 int
upload_dir(struct sftp_conn * conn,const char * src,const char * dst,int preserve_flag,int print_flag,int resume,int fsync_flag)1926 upload_dir(struct sftp_conn *conn, const char *src, const char *dst,
1927 int preserve_flag, int print_flag, int resume, int fsync_flag)
1928 {
1929 char *dst_canon;
1930 int ret;
1931
1932 if ((dst_canon = do_realpath(conn, dst)) == NULL) {
1933 error("Unable to canonicalize path \"%s\"", dst);
1934 return -1;
1935 }
1936
1937 ret = upload_dir_internal(conn, src, dst_canon, 0, preserve_flag,
1938 print_flag, resume, fsync_flag);
1939
1940 free(dst_canon);
1941 return ret;
1942 }
1943
1944 char *
path_append(const char * p1,const char * p2)1945 path_append(const char *p1, const char *p2)
1946 {
1947 char *ret;
1948 size_t len = strlen(p1) + strlen(p2) + 2;
1949
1950 ret = xmalloc(len);
1951 strlcpy(ret, p1, len);
1952 if (p1[0] != '\0' && p1[strlen(p1) - 1] != '/')
1953 strlcat(ret, "/", len);
1954 strlcat(ret, p2, len);
1955
1956 return(ret);
1957 }
1958
1959